/*
 * Copyright 2010 Traction Software, Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.tractionsoftware.gwt.user.client.ui.impl;

import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.tractionsoftware.gwt.user.client.ui.InputWidget;

/**
 * Uses an HTML5 input type=time control to implement the UTCTimeBox
 * 
 * @author andy
 */
public class UTCTimeBoxImplHtml5 extends UTCTimeBoxImplShared {

	private static final DateTimeFormat timeInputFormat = DateTimeFormat
			.getFormat("HH:mm");

	private InputWidget widget;

	public UTCTimeBoxImplHtml5() {
		widget = new InputWidget("time");
		setTimeFormat(timeInputFormat);

		widget.addValueChangeHandler(new ValueChangeHandler<String>() {

			@Override
			public void onValueChange(ValueChangeEvent<String> event) {
				fireValueChangeEvent(getValue());
			}

		});

		initWidget(widget);
	}

	@Override
	public Long getValue() {
		String value = widget.getValue();
		// Window.alert(value);
		return string2long(value);
	}

	@Override
	public void setValue(Long value, boolean fireEvents) {
		String sValue = long2string(value);
		// Window.alert(sValue);
		widget.setValue(sValue, fireEvents);
	}

	@Override
	public String getText() {
		return value2text(getValue());
	}

	@Override
	public void setText(String text) {
		setValue(text2value(text), true);
	}

	@Override
	public HandlerRegistration addValueChangeHandler(
			final ValueChangeHandler<Long> handler) {
		return addHandler(handler, ValueChangeEvent.getType());
	}

	public void fireValueChangeEvent(Long value) {
		ValueChangeEvent.fire(this, value);
	}

	@Override
	public void setTabIndex(int tabIndex) {
		widget.setTabIndex(tabIndex);
	}

	// ----------------------------------------------------------------------
	// the core translation methods of this class using the form HH:mm

	// we only obey hh:mm
	private Long string2long(String value) {
		return parseUsingFormat(value, timeInputFormat);
	}

	private String long2string(Long value) {
		return formatUsingFormat(value, timeInputFormat);
	}

}
